Is Revit running slow?  Here are some tips I found from Revitmotion that will help make Revit run faster and more smoothly.  Enjoy!

• Close all views that you do not need at the moment.
  • This is especially true when saving as Revit re-calculates all open views after saving.
• Only have one file open at a time.
• Use constraints with caution.
• Turn off shadow(s) until you want to print.
• Keep your template and your project file as clean as possible.
• Close Revit during lunch.
• When working with central files:
  • Create a new local file every day.
  • Regularly compact the central file.
• When working with single files:
  • Don't. Still make a central file out of it, put it on a server, and work in the local file.
• Work in a local file that resides on your own computer. Don't put files on a server unless it's the central file.